<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
        obj = {
            name:"张三",
            age:23,
            hobby:{
                likesOne:"ball",
                likesTwo:"game",
                likesThree:{
                    person:"**"
                }
            }
        };
        function deepFreeze(obj){
            Object.freeze(obj);
            for( let key in obj ){
                if ( typeof obj[key] == "object" ){
                    deepFreeze(obj[key]);
                }
            }
        }
        deepFreeze(obj); 
        obj.hobby.likesThree.person = 'asd' ;
        console.log(obj);
    </script>
</body>
</html>